Radiator tube



F. F. JUNGERHELD.

RADIATOR TUBE.

APPLICATION FILED IAN. I. Iszo.

Patented. May 23, 1922..

STATES Parar FFQ.

FREDERICK F. JUNGERHELD, 0F SAGINAW, MICHIGAN, ASSIG-NOR OF ONE-FOURTH TO WELLINGTON B. WYLIE, OF SAGINAW, MICHIGAN, AND ONE-FOURTH.' TO STORK MOTOR COMPANY, OF SAGINAW, MICHIGAN, A CORPORATION.

RADIATOR TUBE.

Specification of Letters Patent.

Patented May 23, 1922.

T0 all whom t may concern.'

Be it known that I, FREDERICK F. JUNGER- HELD, a citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in Radiator' Tubes; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilledA in the art to which it appertains to make and use the same.

This invention relates to the manufacture of-flat sheet metal tubes adapted to be as sembled to form cores of radiators or coolers, as for example the radiators of automobiles.

My invention consists in an improved construction or form of the sheet metal walls of the tube and the means by which the two walls are secured together, whereby I am enabled to manufacture radiator tubes of the class described very cheaply and at a high rate of production and with expenditure of only a small amount of manual labor.

My invention more specificially has for its object the production of Hat radiator tubes, the two walls of which are capable of being formed by passing strips of sheet metal through forming rollers, one of the strips being wider than the other and formed with flanges. The two strips, upon emerging from the rolls are oined together and the flanges of the wider strips are closed about the edges of the narrow strip. By so constructing` the tube walls and arranging the lateral projections thereon so as to permit the metal strips to be formed by rolling without becoming bent, I am enabled to produce completed radiator tubes in the form of long ribbons or bands of great length that need only to be out to length in order to adapt them to be assembled as radiator core With the foregoing and certain other objects which will appear later in the speciication, my invention comprises the devices described and claimed and the equivalents thereof.

In the drawings, Fig. l is a perspective view of one end of a completed radiator tube.

Fig. 2 is a perspective view of the flanged side of the radiator tube before being assembled.

Fig. 3 is a similar perspective of the other side of the tube.

F ig. t is an enlarged face view a radiator tube.

Figs. 5 and 6 are respectively sections on the lines 5 and 6 of 1F ig. 4.

Fig. 7 is an edge view of a number of radiator tubes assembled, as in forming a radiator core, the lateral projections of each tube being opposite each other.

Fig. 8 is anrend view of the parts shown in Fig. 7.

Fig. 9 is a side view similar to Fig. 7, except that the lateral projections of thetwo sides of the tube are arranged in staggered relation.

Fig. l0 is an end view of the parts shown in Fig. 9.

Fig. 1l is a diagrammatic view showing the method of forming the sides of the tube and assembling them by the continuous method of rolling.

As is clearly shown in the drawings, Fios. l to 3 inclusive, the tube consists of a wider ribbon or strip of sheet metal l which forms one side of the tube and a narrower strip 2 which forms the other side. Y

The longitudinal edges 3 of the strip l are folded upon themselves to enclose the longitudinal edges 4 of the narrower strip. The faces of the two strips are odset with respect to their lateral edges to forni a water space 5 between the tubes, as is usual in radiator tubes of this character. The two walls are kept properlyT spaced apart by internal projections 6 formed in the opposing sheets, to prevent flattening or collapsing of the tubes.

External projections 7 are likewise provided to keep adjoining tubes spaced apart in the core assembly, forming air spaces 8 between the tubes.

The external projections 7 on the two walls of a tube may be directly opposite each other, as in Fig. 7, or may be staggered with respect to each other, as in Fig. 9, but in each case the projections 7 of adjacent tubes abut against each other, as in Figs. 7 and 9.

of part of It will be noticed by reference to Figs. l to 4 inclusive that each outward projection 7 is adjacent an inward projection G and that the series oi. projections are symmetrical with respect to a longitudinal cen ter-liiie along the tube.

By this arrangement I ain enabled to torni the projections and flanges in the side tubes by rolling, as indicated diagrammatically in Fig. l1, without warping or distorting the strips, that is to say, they emerge from the rolls without any lateral twist or weave, and consequently the two strips can be laid together as they emerge from the two sets of forming rolls and the flanges of the wider strip can be folded down upon the edges of the narrower strip by a second rolling operation, after which the long tube may be cut to proper length and the fianged edges soldered by dipping or otherwise. i

By this means I have prduced a radiator tube that is capable of being formed by rolling Without lateral distortion, the forming operation being capable of being performed automatically by machinery'. The two ribbons of nieta-l may be fed from large coils into the respective rolls, after which the operation is continuous until all of the ma- Vterial has passed through the rolls and been formed into completed tubes.

ing respectively the two longitudinal edges oi. the narrower sheet, each sheet provided with a plurality of rows of outwardly projecting offsets to form. abutnients between adjacent tubes, and inwardly projecting oit'- sets intermediate said outward offsets to l form spacers tor the sides ofsaid tube.

2. A radiator core comprising a plurality ot water tubes, the sides of each tube made l from two sheets of metal, one'sheet wider than the other, the two longitudinal edges of said wider sheet bent upon and enclosing respectively the two longitudinal edges ot the narrower sheet, each sheet formed with a plurality ot' rows of outwardly projecting offsetsV to form abutnients between adjacent M tubes, and inwardly projectingotfsets adj acent each et said outwardly projecting otifsets, said inward offsets comprising spacers tor holding apart the sides of said tube.

In testimony whereof I affix my signature.

FREDERICK F. J UNGERI-IELD. 

